KR20130057849A - Mask pack - Google Patents

Abstract

The present invention relates to a mask pack impregnated with a cosmetic liquid to be used on the skin of the human body, especially the face.

Description

Mask Pack {MASK PACK}

The present invention relates to a mask pack impregnated with a cosmetic liquid to be used on the skin of the human body, especially the face.

Mask pack products are generally used in the cosmetic field, particularly to protect the skin from external irritation or dryness. Conventionally, as a mask pack, the nonwoven mask pack which impregnates a cosmetic liquid with a nonwoven fabric and sticks to a face is used. Figure 1 shows a nonwoven mask pack according to the prior art commonly used.

However, these non-woven mask packs are thick (approximately 15-50 μm) and do not have a large surface area ratio per volume, so they can easily be easily moved when attached to the face, and furthermore, the long-lasting effect of the cosmetic liquid after application is also reduced. there was.

In view of this, nanofiber coated nonwoven mask packs have been proposed. Since the nanofibers have a large surface area and a thin thickness compared to the nonwoven fibers (less than about 1 μm), the nonwoven mask pack coated with the nanofibers may exhibit a significant improvement in skin adhesion than the conventional nonwoven mask packs. For example, Japanese Laid-Open Patent Publication No. 2007-70347 discloses a skin nonwoven fabric and a face pack. This document discloses a laminated nonwoven fabric for skin adhesion comprising a nanofiber layer and a nonwoven layer as an adhesion surface to be attached to the skin. However, since the nanofiber coated nonwoven mask pack is simply attached to the nonwoven fabric by an electrostatic force, there is a possibility that layer separation (nanofiber peeling) may easily occur when the cosmetic liquid is impregnated.

Accordingly, there is an urgent need for the development of a mask pack having excellent skin adhesion and improved nanofiber peeling phenomenon.

Japanese Laid-Open Patent Publication No. 2007-70347

An object of the present invention is to provide a mask pack with improved skin adhesion and nanofiber peeling phenomenon.

The present invention in order to achieve the above object; And a mask pack comprising a nanofiber layer comprising a hydrophilic polymer, it provides a mask pack, characterized in that the nanofiber layer is bonded (bonded) to the nonwoven fabric layer.

The mask pack according to the present invention is not only well impregnated with the cosmetic liquid due to the hydrophilic nanofiber layer and excellent skin adhesion, but also due to the intimate bond between the nonwoven fabric layer and the nanofiber layer, in particular due to the use of an adhesive layer, The phenomenon in which the nanofibers are peeled off while the liquid is impregnated can be greatly improved.

These and other features of the present invention will become more apparent from the following description of the accompanying drawings.
1 shows a nonwoven mask pack according to the prior art.
2 is a schematic diagram showing a mask pack according to an embodiment of the present invention.
3a to 3c show a method of manufacturing a nanofiber coated mask pack according to an embodiment of the present invention (embodiment). FIG. 3A illustrates a nonwoven fabric layer, FIG. 3B illustrates an adhesive layer formed on the nonwoven fabric layer, and FIG. 3C illustrates a nanofiber layer formed on the nonwoven fabric layer on which the adhesive layer is formed.

Hereinafter, the present invention will be described in more detail.

Mask pack according to the invention non-woven layer; And a nanofiber layer including a hydrophilic polymer, wherein the nanofiber layer is bonded to the nonwoven fabric layer.

When the nanofiber layer is formed to improve skin adhesion on the rayon-PET spunlace nonwoven fabric widely used in a mask pack, the present invention is easily delaminated when the cosmetic solution is impregnated. Found what appeared. While searching for a method for improving the nanofiber peeling phenomenon, as a result of forming a bond between the nonwoven fabric layer and the nanofiber layer, for example, forming an adhesive layer on the nonwoven fabric and then coating the nanofiber, Not only did the nanofiber peeling phenomenon be significantly improved, but the skin adhesion without skin irritation was found to be improved.

2 is a schematic diagram showing a mask pack according to an embodiment of the present invention. In FIG. 2, 1 represents a nonwoven fabric layer, 2 represents an adhesive layer, and 3 represents a nanofiber layer. Hereinafter, each layer will be described in detail.

<Nonwoven fabric layer>

In the present invention, the nonwoven fabric layer is a basic sheet of a mask pack impregnated with a cosmetic liquid. The nonwoven layer is not particularly limited as long as it is made of any nonwoven fabric that is commonly used, but it is preferable to use a nonwoven fabric containing hydrophilic fibers in order to smoothly impregnate the cosmetic liquid. As the hydrophilic fiber, one or more fibers selected from rayon, cotton, pulp, nylon, cellulose and the like can be used.

The nonwoven layer may also comprise a polymer such as polyester (e.g. PET) for ease of handling, ease of processing and the like.

As a mixed nonwoven fabric layer of hydrophilic fiber-polymer, the nonwoven fabric layer which contains rayon and polyester (PET) is mentioned, for example. In this case, the weight ratio of rayon to polyester (PET) may be preferably 5: 5 to 9: 1, more preferably 7: 3 to 8: 2.

The nonwoven layer may be a meltblown nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, or the like according to a manufacturing method, but the present invention is not limited thereto.

As used herein, the term "nonwoven" means a web comprising a plurality of randomly oriented fibers. The fibers may be staple fibers or continuous filaments.

The nonwoven layer may preferably range from 96.5 to 99% by weight based on the total weight of the mask pack, and the thickness of the nonwoven layer is not particularly limited but may range from 0.30 to 0.40 mm. There is no particular limitation on the basis weight of the fibers constituting the nonwoven layer, but it may range from 40 to 60 gsm.

<Nano fiber layer>

In the present invention, the nanofiber layer is used as the skin adhesion surface. There is a nonwoven layer on the opposite side that is attached to the skin. If there is an adhesive layer, a nonwoven layer exists with the adhesive layer in between.

The nanofiber layer has excellent skin adhesion (adhesiveness) because the nanofiber easily enters the fine grooves on the surface of the skin, and since the nanofiber retains a nano-sized fiber diameter, the liquid retention property of the cosmetic liquid may be greatly improved.

The nanofibrous layer contains a hydrophilic polymer as it is used as a skin adhesion surface. Hydrophilic polymers that can be used include polyacrylonitrile (PAN), hydrophilic polyurethane (PU), polyvinyl alcohol (PVA), nylon (nylon 6), hydrophilic polyvinylidene fluoride (PVDF), and hydrophilic polyether sulfone (PES). ), Polyetherimide (PEI) and the like. As the hydrophilic polymer, polyacrylonitrile (PAN) may be preferably used.

The nanofiber layer may further include a thermoplastic polyurethane (TPU) to increase the softness when attaching the skin and to prevent damage to the nanofiber layer due to external friction or contact such as scratches or cracks. The polyurethane polymer may be a hydrophilic polymer and may be a hydrophobic polymer. Here, the weight ratio of polyacrylonitrile and polyurethane is preferably 6: 4 to 9: 1.

The nanofiber layer is preferably 0.6 to 3% by weight based on the total weight of the mask pack, the basis weight of the nanofibers is preferably 0.4 to 2 gsm considering the air permeability. In order to improve skin adhesion and ensure that the cosmetic liquid can be delivered to the skin during use, the pore size of the nanofiber layer is preferably 0.8 to 3 μm, and the short fiber diameter of the nanofiber is preferably 100 to 300 nm. The thickness of the nanofiber layer is not particularly limited, but is preferably in the range of 0.5 to 2 μm.

The nanofiber layer may be in the form of an aggregate in which a plurality of fibers are dispersed or in which a plurality of fibers are aggregated, but is preferably in a form in which fibers are bonded to each other.

In order to form the nanofibrous layer of the bonded form of the fibers, the nanofiber layer of the present invention may further include a hot-melt polyurethane (hot-melt PU). Hot-melt polyurethane is a well known adhesive in the art mainly composed of thermoplastic polyurethane resin, and is a 100% solid adhesive containing no water or organic solvent at all. The hot melt polyurethane may be composed of only polyurethane resins, but may further include waxes, tackifiers, plasticizers, and the like, like general hot melt adhesives. Hot-melt polyurethane not only promotes fiber-fiber bond formation of the nanofiber layer but also contributes to bond formation between the nanofiber layer and the nonwoven layer. The amount of the hot melt polyurethane may be 5 to 15% by weight based on the total weight of the composition constituting the nanofiber layer.

In addition to the above components, the nanofiber layer may be added, if necessary, additives such as pigments, which are usually formulated, in a range that does not impair the effects of the present invention.

<Bond formation between nonwoven fabric layer and nanofiber layer>

In the present invention, the nanofiber layer is bonded to the nonwoven layer. Bonding between the nonwoven fabric layer and the nanofiber layer may be performed using one or more selected from the group consisting of an adhesive layer, a fusible film, heat and ultrasonic waves. For example, the nanofiber layer obtained by a method such as electrospinning may be manufactured by bonding the nanofibers to a nonwoven fabric using an adhesive or directly electrospinning the nanofibers on the nonwoven fabric to which the adhesive is applied.

The mask pack of the present invention may comprise one or more additional layers, for example a bonding layer, interposed between the nonwoven layer and the nanofiber layer. One or more adhesives may be used as the bonding layer.

The adhesive layer usable in the present invention may be made of an acrylic adhesive, a polyurethane adhesive, a polyester adhesive, a silicone adhesive, or a combination thereof. Preference is given to using acrylic adhesives, polyurethane adhesives and polyester adhesives.

The adhesive is preferably used in a minimum amount in the range that does not cause nanofiber peeling without causing skin irritation. In the present invention, the adhesive layer may generally be used in the range of 0.05 to 0.5 wt% based on the total weight of the mask pack.

The adhesive layer may be formed on the nonwoven layer by a method such as coating or deposition, which is a general method known in the art.

After the nanofiber layer is applied on the nonwoven fabric layer, a conventional post-processing (calendering process) is performed to complete the mask pack of the present invention.

Figures 3a-3c shows the process of manufacturing a nanofiber coated mask pack according to an embodiment of the present invention (embodiment). First, Figure 3a shows a state in which the nonwoven fabric layer 1 according to the present invention is formed. An adhesive layer 2 is formed by applying an adhesive on the nonwoven fabric layer 1 as shown in FIG. 3B, and then, as shown in FIG. 3C, the nanofibrous layer is formed by electrospinning on the nonwoven fabric layer 1 having the adhesive layer 2 formed thereon. 3) to form a mask pack according to the present invention.

The mask pack of the present invention can be impregnated with a cosmetic liquid. The cosmetic liquid impregnated into the mask pack of the present invention may contain, for example, a moisturizing component, a cleansing component, a whitening component, a sunscreen component, and the like as an active ingredient, and the present invention is not limited thereto. It may contain any ingredient that is expected to exert a specific action on the skin.

The amount of impregnation of the cosmetic liquid impregnated into the mask pack may be appropriately determined depending on the nature of the mask pack, particularly the absorbency. While it is possible to supply a sufficient amount of the active ingredient to the skin, it is desirable to select an amount that can minimize the discomfort during use, such as liquid spilling.

The mask pack of the present invention can also be used for applications other than face masks. For example, the mask pack of this invention which impregnated the cosmetic liquid containing a moisturizing component can be attached to a neck, an elbow, or an heel, and can be used.

Hereinafter, the present invention will be described in detail with reference to examples. However, the following examples are illustrative of the present invention, and the present invention is not limited by the following examples.

&Lt; Example 1 >

First, as a nonwoven fabric, 60 gsm of rayon-PET spunlace (Namyang nonwoven fabric) containing viscose rayon and PET in a weight ratio of 8: 2 was prepared.

0.3 g of a polyurethane adhesive was applied on the nonwoven fabric to form a rayon-PET spunlace nonwoven fabric layer coated with a polyurethane adhesive.

6.30 g of PAN, 3.15 g of hydrophilic PU, 1.04 g of hot melt PU, and 0.01 g of pigment were dissolved in the dimethylacetamide solution (89.5 g) on the adhesive coated nonwoven fabric layer, followed by electrospinning to prepare a nanofiber coated nonwoven fabric. . At this time, the basis weight of the nanofiber layer was 0.4, 0.8 and 1.1 gsm.

Each obtained nanofiber coated nonwoven fabric was cut, and then each cut nonwoven fabric was folded twice, placed in a mask pack packaging container, and a cosmetic liquid (22g, HongSam (C & Tech)) was injected into the packaging container. The packaging container was sealed and then stored at room temperature for 3 days, 7 days and 15 days, respectively, to prepare a desired mask pack sample.

<Example 2>

The nonwoven fabric sample obtained by the same procedure as in Example 1 was folded twice and placed in a mask pack packaging container except that the nanofiber basis weights were 0.3 and 1.3 gsm, and then the cosmetic liquid (22g, HongSam (C & Tech)) was placed in the packaging container. ) Was injected. The packaging container was sealed and then stored at room temperature for 30 minutes to prepare the desired mask pack sample.

<Example 3>

After the nonwoven fabric sample obtained by the same procedure as in Example 1 was folded twice and placed in a mask pack packaging container, a cosmetic liquid (22g, HongSam (C & Tech)) was injected into the packaging container. The packaging container was sealed and then stored at room temperature for 1 day to prepare the desired mask pack sample.

&Lt; Comparative Example 1 &

Except not forming a polyurethane adhesive layer, the nonwoven sample obtained by the same process as in Example 1 was folded twice and placed in a mask pack packaging container, and then a cosmetic liquid (22g, HongSam (C & Tech)) was placed in the packaging container. Injected. The packaging container was sealed to prepare a mask pack sample.

< Evaluation example  1> Nanofiber Peeling Test nanofiber delamination test )

The nanofiber peeling phenomenon was visually observed for the mask pack samples prepared in Example 1 and Comparative Example 1. The results are shown in Table 1 below.

Sample Nanofiber basis weight (gsm) Nano Fiber Peeling Phenomenon 3 days 7 days 15th Example 1 0.4 none none none 0.8 none none none 1.1 none none none Comparative Example 1 0.4 Peel off after 20 minutes 0.8 Peel off after 20 minutes 1.1 Peel off after 20 minutes

As shown in Table 1, the mask pack according to the present invention did not occur even after 15 days of nanofiber peeling phenomenon, while the mask pack not including the polyurethane adhesive layer was all peeled off after 20 minutes.

< Evaluation example  2> Skin adhesion test skin adherence test )

The mask pack sample prepared in Example 2 was applied to five subjects on the face for 30 minutes, and the degree of skin adhesion was evaluated as follows. Conventional mask pack samples without nanofibers were evaluated as a control. The results are shown in Table 2 below.

X: not good

○: excellent

◎ very good

(The above results are prepared as the average value of 5 subjects)

Sample Nanofiber basis weight (gsm) Skin adhesion Sample 1 0.3 ○ Sample 2 1.3 ◎ The control (control) 0 X

As shown in Table 2, it can be seen that the mask pack according to the present invention has superior skin adhesive force as compared to a mask pack composed of a conventional nonwoven fabric only.

< Evaluation example  3> Skin irritation test ( skin irritation test )

For four subjects, the mask pack sample prepared in Example 3 was attached to the face for 30 minutes, and the presence or absence of skin irritation (itch, inflammation, etc.) was evaluated. The results are shown in Table 3 below.

Subject Skin irritation Nano Fiber Basis Weight
(0.4 gsm) Nano Fiber Basis Weight
(0.8 gsm) Nano Fiber Basis Weight
(1.1gsm) Subject 1 none none none Subject 2 none none none Subject 3 none none none Subject 4 none none none

As shown in Table 3, it can be seen that the mask pack according to the present invention is very safe for human skin.

1: nonwoven fabric layer
2: adhesive layer
3: nanofiber layer

Claims (15)

A nonwoven fabric layer; And
Nanofiber layer containing hydrophilic polymer
A mask pack comprising: a mask pack, wherein the nanofiber layer is bonded to the nonwoven layer. The method of claim 1,
Bonding between the nanofiber layer and the nonwoven layer is carried out using at least one selected from the group consisting of an adhesive layer, a fusible film, heat and ultrasonic waves. Mask Pack. The method of claim 1,
And at least one additional layer interposed between the nonwoven layer and the nanofiber layer. The method of claim 3, wherein
And the additional layer is a bonding layer. The method of claim 4, wherein
And the bonding layer comprises at least one adhesive. The method of claim 5, wherein
And the adhesive is selected from the group consisting of acrylic adhesives, polyurethane adhesives, polyester adhesives, and silicone adhesives. The method of claim 1,
And the nonwoven layer comprises one or more hydrophilic fibers selected from the group consisting of rayon, cotton, pulp, nylon and cellulose. The method of claim 1,
The nonwoven layer mask pack, characterized in that the rayon (rayon) fibers and polyester (PET) fibers. The method of claim 8,
Mask weight, characterized in that the weight ratio of the rayon fibers and polyester (PET) fibers of the nonwoven fabric layer is 5: 5 to 9: 1. The method of claim 1,
The hydrophilic polymer of the nanofiber layer is polyacrylonitrile (PAN), hydrophilic polyurethane (PU), polyvinyl alcohol (PVA), nylon, hydrophilic polyvinylidene fluoride (PVDF), hydrophilic polyether sulfone (PES) and poly Mask pack, characterized in that at least one member selected from the group consisting of etherimide (PEI). The method of claim 1,
The nanofiber layer mask pack, characterized in that further comprises a thermoplastic polyurethane (TPU). The method of claim 5, wherein
The nonwoven fabric layer, the nanofiber layer and the adhesive layer are 96.5 to 99% by weight, 0.05 to 0.5% by weight and 0.6 to 3% by weight, respectively, based on the total weight of the mask pack. The method of claim 1,
The nanofiber layer mask pack, characterized in that further comprises a hot-melt polyurethane (hot-melt PU). The method of claim 13,
The hot melt polyurethane is a mask pack, characterized in that used in 5 to 15% by weight based on the total weight of the composition constituting the nanofiber layer. The method of claim 1,
A mask pack, further comprising a cosmetic liquid.

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